Bugzilla – Bug 61
Desynchronised tones playback
Last modified: 2018-08-20 11:51:53 UTC
GA: On XP and Vista (but not Linux), generate a 60s tone and select and duplicate a number of regions 5 seconds in length. Invert each duplicate in turn and play it. On regions after the first, there is (instead of silence) an audible noise right at the end of playback which also shows in the meters. Unable to reproduce with music, but it clearly isn't correct.
Did not see this on WinXP debug build. Tried with snap-to off and on.
Created attachment 211 [details] aup with example problem - pings the meter on playback. This aup has a careful 'selection' which if you press 'Enter' (to select the first track) and then 'duplicate', select the new track and 'Effects->Invert' you should get something identical to the second track. You can see that the samples of the second track (or dup that you made) are out of line with the first track. For some reason on playback this causes the click (if you duplicated, don't forget to mute one of them). I have also included a third track with the new bit in the 'right' place (initial patch to follow).
Created attachment 212 [details] Incomplete patch This will give a more sensibly aligned dup, for a WaveTrack. It isn't a proposed patch as it does not test for label tracks etc., just an idea. We need to do this just for a WaveTrack. Somebody want to take this on?
(In reply to Martyn Shaw from comment #3) This has lain here moribund for seven years - maybe we should just close it
Tested on windows and works perfectly for me. (We expect a click at the start and end of one of these inverted regions.)
